Cruise Control Issue
#1
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Join Date: Dec 2012
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Model: Cherokee
Cruise Control Issue
New to the site. I have a 01 Grand Cherokee Limited with the 4.7. My problem is after I drive awhile with the cruise on (the cruise works fine), when I cancel the cruise and driving slow in town the engine runs rough. The idle goes from 600 to 500 or less and feels like its going to die. It does this for a little while, then it clears up and runs fine. I tried driving the same distance on the highway not using the cruise and did not have the problem. Any suggestions?
#2
Old fart with a wrench
Try looking for a vacuum leak in the cruise system. Sounds like the vacuum resivoir has to be charged again before it runs smooth.
#4
Old fart with a wrench
I believe the vacuum resevoir is underneath the battery tray. Don't quote me on that. Be careful removing the tray because there is a battery temp sensor under the battery. It tells the PCM how to control the charging rate.
Last edited by dave1123; 12-23-2012 at 06:30 PM.
#5
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Join Date: Mar 2009
Location: Tenn. and Mich.
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Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
Welcome to CF. Not sure that's your issue, but here's some diagrams of the WJ vacuum reservoir.
I'd check for any stored trouble codes. You can do this yourself, this tells how, and see the list of codes here. >http://www.wjjeeps.com/faultcodes.htm#ERASE
I'd check for any stored trouble codes. You can do this yourself, this tells how, and see the list of codes here. >http://www.wjjeeps.com/faultcodes.htm#ERASE
Last edited by ol"blue; 12-23-2012 at 09:57 PM.
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